package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MemberSignature;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 * 自定义切面，实现公共字段自动填充处理逻辑
 * @author wfyn
 * @date 2023/10/4
 */
@Aspect
@Component
@Slf4j
public class AutoFillAspect {



    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut() {
    }

    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint) throws InvocationTargetException, IllegalAccessException, NoSuchMethodException {

        log.info("公共字段填充...");
        // 获取方法签名
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();

        // 获取注解信息
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);

        // 获取操作类型
        OperationType value = autoFill.value();

        // 获取方法参数
        Object[] args = joinPoint.getArgs();

        if (args == null || args.length == 0) {
            return;
        }

        // 获取实体对象
        Object entity = args[0];

        // 获取当前时间和用户ID
        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();

        if (value == OperationType.INSERT) {
            // 插入操作，填充创建时间、更新时间、创建用户、更新用户
            Method setCreateTime = entity.getClass().getMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
            Method setUpdateTime = entity.getClass().getMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
            Method setCreateUser = entity.getClass().getMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
            Method setUpdateUser = entity.getClass().getMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
            setCreateTime.invoke(entity, now);
            setUpdateTime.invoke(entity, now);
            setCreateUser.invoke(entity, currentId);
            setUpdateUser.invoke(entity, currentId);
        } else if (value == OperationType.UPDATE) {
            // 更新操作，填充更新时间和更新用户
            Method setUpdateTime = entity.getClass().getMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
            Method setUpdateUser = entity.getClass().getMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
            setUpdateTime.invoke(entity, now);
            setUpdateUser.invoke(entity, currentId);
        }
    }


}
